Knob attachment



(No Model.)

C. F. DOEBLBR.

KNOB ATTACHMENT. A

Patented Aug. 4, 1896.

l .7 gl.

'mgl QM@ vr] UNITED STATES PATENT EEicE.

CHARLES F. DOEBLER, OF `IIAR'IFORD, CONNECTICUT.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 565,109, dated August4, 1896.

Application iiled February 26, 1896. Serial No. 580,812. (No model.)

To @ZZ whom, t may con/cern:

Be it known that I, CHARLES F. DOEBLEE, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements-in Knobs,of which the following is a specification.

This invention relates to knob attachments of that class commonly knownas screvvless knobs, the object fof the invention being to provide aknobattachment of this class which shall be simple in construction andorganization, effective in its operation, and which may be quicklyattached to or removed from the lock of a door.

4In the drawings accompanying and forming part of this specification,Figure l is a sectional view of a portion of a door and doorlock,showing in sectional side elevation my improved knob attachment appliedthereto. Fig. i is a horizontal sectional view, taken in dotted line aa, Fig. l, of the knob attachment, a portion ot one of the knob-stemsbeing shown in plan vieuT and a portion of the door and lock-case beingshown in dotted lines. Fig. 3 is a cross-sectional view of the knobattachment, taken in dotted line b b, Fig. 2, and looking toward theleft hand in said igure, only a portion of the knob at the lefthandinFig. Zbeing shown. Fig. 4 is a crosssectional view of the knobattachment, taken in dotted line c c, Fig. 2, looking toward the righthand in said figure, and showing only a portion of the knob. Fig. 5 is across-sectional view, upon a relatively large scale, of the knobattachment, said section being taken in dotted line d CZ, Fig. 2,looking toward the right hand in said figure, and showing the eX-pansible spindle and the expanding device therefor in their non-clampingor 'ineffective positions, said ligure showing only a portion of theknob; and Fig. 6 is a cross-sectional View similar to Fig. 5, showingthe expansible knob-spindle and its expanding device in their edectiveclamping positions.

Similar characters designate like parts in all the gures of thedrawings.

For the purpose of illustrating the application and mode of operation ofmy improved screivless knob attachment, the same is shown in Fig. lapplied to a door B, having therein the usual lo ck-case C- ,f urnishedwith the usual cani or hub D for actuating the lock mechanism. (Notshown.) Said hub D is actuated by means of the knob-spindle, (designatedin a general Way by 5,) which extends through said hub When the parts ofthe knob attachment are assembled, and which stem is usually provided atopposite ends With knobs K and L, respectively, Whose knob-stems 5 and6, respectively, are perforated longitudinally for the reception of thesquared or polygon al spindie S.

One of the knobs, as K, may be secured to one end of the spindle S inany suitable manner-as, for instance, by means of the presentimprovements, or otherwise-said knob I being shown in Figs. l and 2iixedly secured to the left-hand end of the spindle S by means of a pin5', which extends through the knobstem 5 and spindle.

In the preferred embodiment of my invention the knob attachmentcomprises in part a laterally-expansible spindle, a knob carried uponsaid spindle, and a spindle-expanding device carried by said knob inposition and shiftable transversely of the spindle for engaging andexpanding said spindle to lock the spindle and knob together and againstlongitudinal movement relatively to each other.

In the construction thereof shown most clearly in Figs.` l and 2 of thedrawings the spindle S is of the usual squared cross-sectional t'orm atthat end to which the knob l is ixedly secured, and the opposite endthereof is grooved and slitted longitudinally and centrally, as shown atE, to form tWo relatively-expansible resilient Walls 3 and et, havingoppositely-inclined adjacent faces S and which converge toward the outerface of the spindle and together form an expansiblecross-sectionally-V-shaped longitudinal bearing or seat for thereception of an expanding member orwedge 7, which is pivotally carriedWithin the knob-stem G of the knob I., and which constitutes theknob-spindle expander of the expanding or locking device, whichexpanding device locks the knob relatively to said spindle. The othermember of the spindie-expanding device is in the nature of a screw S,seated in the screw-threaded bearing Jformed radially through the knob-stem (i, which screw bears at its inner end against IOO the expandingmember 7 and constitutes the actuating member of the spindle-expandingdevice.

In the preferred form thereof shown in Figs. l, 2, 4, 5, and 6 theexpanding member 7 is in the nature of an elongatedcross-sectionally-V-shaped wedge adapted to fit the V- shaped bearing inthe spindle S, as shown in said figure.

As a means for pivotally securing the expanding member or wedge to thestem G of the knob L in proper position to enter the V- shaped bearingin the spindle, when the stem is projected into the axial recess in theknobstem 6, said member has a transversely-perforated lug or projection7 at the inner end thereof, which in practice will be relatively narrowas compared with the width of the upper face of the expanding-wedge,andwhich is pivotally secured in a longitudinal recess formed in the innerend of the knob-stem 6, a pivot-pin 9 being extended throughv the sidewalls of this recess and the lug 7', as will be understood by referenceto Figs. 2 and 4 of the drawings.

As will be seen by reference to Figs. 1 and 5 of the drawings, theexpanding-wedge 7 is pivotally supported near the extreme inner endthereof at a point above the plane of movement of the spindle and isleft free at the outer end thereof for movement in a plane intersectingthe axis of the spindle, the wedgeshaped body portion thereof beinginclosed when the parts of the knob attachment are assembled by theboundary-line of the V- shaped bearing in said spindle.

In connection with the foregoing description of the construction andorganization of the several elements comprising the knob attachment Idesire to state that structural modifications may be made withoutdeparture from my present invention.

One important feature of mypresent invention is that the knob attachmentmay be applied to or removed from a door without detaching theescutcheon plates or roses E and E', secured to the opposite faces ofthe door in the usual manner.

In assembling the knob attachment in working position upon the door thespindle S, having the knob K ixed to the outer or non-bif urcated endthereof, is extended through the recess of the hub D, and the knob L isthen applied to the opposite expansible end of said spindle in a mannershown in Fig. l of the drawings, the actuating member 8 of the expandingdevice and said expanding device being during this operation in theineffective or non-expanding position shown in Fig. 5. After theknob-stems have a suitable bearing engagement with theescutcheon-plates, as shown in Fig. l, the actuating member is thenscrewed home, which forces the free end of the expanding member 7tightly into the bearing of the spindle, thereby spreading the walls ofsaid spindle, as shown in Fig. 6, and tightly clamping the spindle inthe recess of the knob bythe stem of said knob and removable with said.knob, and in position for engaging and expanding the spindle to lock thespindle an d knob together when assembled.

2. In a knob attachment, the combination with an expansible spindle andwith a knob removably supported on said spindle; of a spindle-expanderpivotally carried by the knob and removable with said knob, and inoperative relation with the spindle g and an expander-actuator carriedby the knob and in operative relation with the expander and adapted foractuating the expander to expand the spindle, and thereby lock saidspindle and knob together.

3. In a knob attachment, the combination with an expansible spindle, andwith a knob removably supported on said spindle; of a spindle-expanderpivotally .supported on the knob-stem between said stem and spindle andremovable therewith, and having a free end in operative relation withthe spindle; and a screw carried by the knob-stem in position to engageand force the free end of the expander into tight impingement with thespindle, to spread said spindle and lock the same relatively to theknob.

et. In a knob attachment, a knob-spindle having a substantially V-shapedexpanderreceiving groove formed in one face thereof and dividing saidspindle longitudinally; combined with a knob removably supported on saidspindle; a wedge-like expander pivotally carried on the knob-stem andremovable with said knob and seated in the V-shaped groove of thespindle; and means carried by the knob-stem for forcing the expanderinto tight impingement with the spindle for expanding the same.

5. In a knob attachment, the combination with an expansible spindlehaving two longit tudinal relatively-separated walls withoppositely-inclined adjacent faces; and with a knob removably carriedupon said spindle; of an expanding-wedge removable with and pivotallycarried on the inner end of the knobstem between the divided walls ofthe spindle; and a screw carried on the knob-stem in position to engagethe free end of the expanding-wedge, to force the same inward relativelyto the spindle, to spread the walls of said spindle and lock the knoband spindle together.

6. In a knob attachment, the combi-nation with a knob, of a knob-spindleexpand er piv- ICO EIO

otally carried therebT and rexnovabletherewith.

7. In a knob attachment; the combination with a knob having an axialspindlenecess; of a spindle-expander pivotallr supported on Said knoband removable therewith, and movable in said recess.

8. In a knob attachment, the combination with a knob-spindle having alongitudinal V- Shaped expandenbearing; of a knob having anaxially-recessed stem receiving said spindle; a spindle-expanderpivotalb7 secured to and inovably seated in the expander-bearing of thespindle Within the axial recess of the knob-stem, and removable withsaid knob; and means for actuating said expander.

9. in a knob attachment, the combination with the expansible spindle and a knob-stem;

CHARLES F. DOEBLER.

Vitnesses:

FRED J. Donn, F. N. CHASE.

